Triboelectrostatic separation of brominated flame retardants polymers from mixed granular wastes

Ahlem Benabderrahmane , Karim Medles (1) , Thami Zeghloul (2) , Pascal Renoux (2) , Lucian Dascalescu (1) , Arnaud Parenty

1 EFD - Électro-Fluido-Dynamique [Institut Pprime]
2 TriboLub - Mécanique des interfaces lubrifiées [Institut Pprime]

The general purpose of the present paper is to study the feasibility of removing brominated flame retardants (BFR) polymers from mixed granular wastes using tribo-electrostatic separation. The study was carried out on mixtures consisting in equal quantities of high impact polystyrene (HIPS) particles either BFR-free or containing 40000 ppm of brome (4.7%). Three triboelectric charging devices were used: a vibrating tribocharger (a container made of stainless steel, polystyrene or polypropylene and fixed on a vibrating table); a rotating cylinder tribocharger made of polyvinyl chloride; a fluidized bed tribocharger, the walls of which were made of poly methyl methacrylate. The selective sorting of the granular mixture was performed using a roll type electrostatic separator. The results confirm that separating BFR HIPS from BFR-free HIPS is feasible. Best separation results were obtained for the mixture tribocharged in the fluidized bed tribocharger.

Mots clés: triboelectrostatic separation; brominated flame retardants polymers; high impact polystyrene particles; triboelectric charging devices; vibrating tribocharger; container; rotating cylinder tribocharger; fluidized bed tribocharger; mixed granular waste; stainless steel; polypropylene; polyvinyl chloride; poly methyl methacrylate; sorting process

Domaines: Mécanique des fluides [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Acoustique [physics.class-ph]; Automatique / Robotique; Electromagnétisme; Milieux fluides et réactifs; Energie électrique; Sciences de l'ingénieur [physics]; Thermique [physics.class-ph]; Vibrations [physics.class-ph]; Physique mathématique [math-ph]; Physique Quantique [quant-ph]; Acoustique [physics.class-ph]; Biomécanique [physics.med-ph]; Matériaux; Polymères

Ahlem Benabderrahmane, Karim Medles, Thami Zeghloul, Pascal Renoux, Lucian Dascalescu, et al.. Triboelectrostatic separation of brominated flame retardants polymers from mixed granular wastes. 2019 IEEE Industry Applications Society Annual Meeting, Sep 2019, Baltimore, France. pp.1-4, ⟨10.1109/IAS.2019.8912375⟩. ⟨hal-02439669⟩